I bought and sent back other laser range finders, because they would not lock on varmint size critters. The 'True track technology' is the ticket. The only problem is holding the brackets on the critter when pushing the button to get the range, as it is easily moved when pushing the button. The eye-piece is easy to adjust and will give you a clear look at what you want to range.
Pros: Easy to use, gives clear and concise measurements.
Cons: It is very easy to move the optical brackets off the critter when pushing the button.
This review was written in the old system and had content requirements that are different than reviews written today.